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# 16,662 Reputation

130 today
 +35 18 hours ago 3 events Algebraic or geometric multiplicity? +30 8 hours ago 3 events Why this constant $c$ is the determinant of the operator +25 18 hours ago 2 events $T$-invariant subspaces, where the characteristic polynomial of $T$ is $x^4-3x^3$ +10 1 hour ago upvote Why solving linear equations is taking a quotient by some subspace? +10 1 hour ago upvote Prove that there are not two matrices 2x2 such that: $AB-BA=I_2$ +10 7 hours ago upvote What kind of $n^{th}$ order polynomials are solvable by a square matrix with integer entries? +10 17 hours ago upvote Proof of Isometry and Reflection
240 yesterday
 +75 16:05 7 events Define $L(A) = A^T,$ for $A \in M_n(\mathbb{C}).$ Prove $L$ is diagonalizable and find eigenvalues +55 20:33 5 events Let $\omega = dx_1 \wedge dx_2 + dx_3 \wedge dx_4 + \cdots + dx_{2n-1} \wedge dx_{2n} \in \mathbb{R}^{2n}$. Find $\omega^n$ (in respect to $\wedge$) +45 13:27 4 events Importance of the homogeneity assumption in definition of linear map +25 21:57 2 events Proof of Isometry and Reflection +25 21:37 2 events What kind of $n^{th}$ order polynomials are solvable by a square matrix with integer entries? +15 00:20 accept Is there an alternative way to represent the $\operatorname{diag}$ function?
135 2 days ago
 +45 14:31 4 events Surface described by the equation $-3y^2 - 4xy + 2xz + 4yz - 2x - 2z + 1 = 0$ +35 14:50 3 events Show that $q(T)(x)=\sum_{n=1}^\infty q(\lambda_n) \langle x,e_n\rangle e_n$ coincide with $q(T)=\sum_{k=0}^n a_kT^k$ +25 17:18 2 events Describe an equation geometrically +10 15:00 upvote Why intersection is not an axiom in naive set theory by halmos +10 14:09 upvote $T$-invariant subspaces, where the characteristic polynomial of $T$ is $x^4-3x^3$ +10 02:12 upvote Is there an alternative way to represent the $\operatorname{diag}$ function?
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